You are evaluating the fetal monitor tracing of your client, who is in active labor. Suddenly you see the fetal heart rate (FHR) drop from its baseline of 125 down to 80. You reposition the mother, provide oxygen, increase IV fluid, and perform a vaginal examination. The cervix has not changed. Five minutes have passed, and the FHR remains in the 80s. What additional nursing measures should you take?

A) Notify nursery nurse of imminent delivery.
B) Insert a Foley catheter.
C) Start oxytocin (Pitocin).
D) Notify the primary health care provider immediately (HCP).